X-Git-Url: https://git.llucax.com/software/bacap.git/blobdiff_plain/dedf20c261c5ff7f7b081dc1d292c1ce42305114..caa02f4c59c79184cef7d682a1f4bd4b7b542a1e:/bacap

diff --git a/bacap b/bacap
index b6d1551..976ee08 100755
--- a/bacap
+++ b/bacap
@@ -12,6 +12,9 @@ DEBUG=0
 # Don't actually do anything, just print the commands
 DRY_RUN=0
 
+# Force synchronization, even when the target already exist
+FORCE_SYNC=0
+
 # Log file (if empty, print to stdout/err)
 LOG_FILE=
 
@@ -27,14 +30,18 @@ BACKUP_PATH=/backup
 # Date format used for backed up directories (passed to the date command)
 DATE_FMT="%Y-%m-%d"
 
+# Ping remote hosts to check if they are up (set to 0 if your hosts don't
+# reply to ICMP pings).
+PING_CHECK=1
+
 # rsync flags to use
-RSYNC_FLAGS="-aAXHx --numeric-ids --delete"
+RSYNC_FLAGS="-aAHSXx --numeric-ids"
 
 # rsync flags to use when in verbose mode
 RSYNC_VERBOSE_FLAGS="-v --stats"
 
 # rsync remote shell to use
-RSYNC_RSH="ssh -c arcfour -o Compression=no -x"
+RSYNC_RSH="ssh"
 
 #_INCLUDE_END_
 
@@ -59,8 +66,8 @@ run=
 	RSYNC_FLAGS="$RSYNC_FLAGS $RSYNC_VERBOSE_FLAGS"
 [ $DEBUG -eq 1 ] &&
 	V=-v
+exec 3>&2
 [ -n "$LOG_FILE" ] &&
-	exec 3>&2 &&
 	exec 1>>"$LOG_FILE" &&
 	exec 2>>"$LOG_FILE"
 
@@ -77,7 +84,7 @@ perror() {
 	echo "$@" >&2
 }
 
-host_up() {
+ping_host() {
 	ping -c1 "$1" > /dev/null 2>&1
 }
 
@@ -90,11 +97,13 @@ plog "========================================================================="
 ret=0
 for host_path in "$CONFIG_PATH"/*
 do
+	saved_ret=$ret
 	# Load default config and override config if correspond
 	load_config
 	source "$host_path/bacaprc" 2>/dev/null
 	host=`basename "$host_path"`
 	host_backup_path="$BACKUP_PATH/$host"
+	mkdir -p $host_backup_path
 	dst="$BACKUP_PATH/$host/$date"
 	src=`cat "$host_path/paths"`
 	[ "$host" != "$LOCALHOST" ] &&
@@ -103,36 +112,55 @@ do
 	include="$host_path/includes"
 	current_link="$host_backup_path/current"
 	current_dir="$host_backup_path/`readlink \"$current_link\"`"
-	exclude_flags=
-	include_flags=
+	extra_flags=
 	plog "-----------------------------------------------------------------"
-	plog "Backup for host $host"
+	plog "Backup for host $host started at `date '+%Y-%m-%d %H:%M:%S'`"
 	plog "-----------------------------------------------------------------"
 	plog "Source:      $src"
 	plog "Destination: $dst"
 	plog "Last:        $current_dir"
 	plog
-	[ -d "$dst" ] &&
+	[ -d "$dst" ] && [ "$FORCE_SYNC" -ne 1 ] &&
 		perror "$dst already exists, skipping..." &&
 		continue
-	! host_up $host &&
+	[ "$PING_CHECK" -eq 1 ] && ! ping_host $host &&
 		perror "$host is down, skipping..." &&
 		continue
 	[ -r "$exclude" ] &&
-		extra_flags="--exclude-from=$exclude --delete-excluded"
+		extra_flags="--exclude-from=$exclude"
 	[ -r "$include" ] &&
 		extra_flags="$extra_flags --include-from=$include"
-	plog "Rotating backup..."
-	$run cp -al $V "$current_dir" "$dst" ||
-		ret=$(($ret+1))
 	plog "Running rsync..."
-	$run rsync $RSYNC_FLAGS $extra_flags $src "$dst/" ||
-		ret=$(($ret+1))
-	plog "Moving current..."
-	$run rm $V "$current_link" ||
+	$run rsync $RSYNC_FLAGS $extra_flags \
+				--link-dest="$current_dir" $src "$dst/"
+	rsync_ret=$?
+	case $rsync_ret in
+		0)
+			# Normal return
+			;;
+		24)
+			# Ignore error 24 from rsync ("Partial transfer due to
+			# vanished source files") which is somewhat expected
+			# since we don't do a snapshot
+			;;
+		*)
+			# Any other error is important enough
+			ret=$(($ret+1))
+			;;
+	esac
+
+	if [ $ret -eq $saved_ret ]
+	then
+		# Only move current if rsync did not fail, to avoid dangling
+		# symlinks
+		plog "Moving current..."
+		$run rm -f $V "$current_link" ||
 		ret=$(($ret+1))
-	$run ln -s $V "$date" "$current_link" ||
+		$run ln -s $V "$date" "$current_link" ||
 		ret=$(($ret+1))
+	else
+		ERROR_HOSTS="$ERROR_HOSTS $host"
+	fi
 done
 
 plog "========================================================================="
@@ -141,10 +169,14 @@ plog "========================================================================="
 
 if [ $ret -ne 0 ]
 then
-	pout 'There were some errors when running the backup.'
 	pout
-	pout "Please take a look at the log: $LOG_FILE"
+	pout "There were some errors when running the backup on: $ERROR_HOSTS"
 	pout
+	if [ -n "$LOG_FILE" ]
+	then
+		pout "Please take a look at the log: $LOG_FILE"
+		pout
+	fi
 fi
 
 exit $ret